I found the following poem in a motivational book about athletes. Arnold Palmer has this poem on a plaque in his office. The author is not identified. I hope you enjoy it...

If you think you're beaten, you are,
If you think you dare not, you don't.
If you'd like to win, but think you can't,
It's almost for sure, you won't.

If you think you're losing, you've lost.
For out in the world we find -
Success begins with a person's will,
It's all in the state of mind.

If you think you're outclassed, you are,
You've got to think high to rise.
You have to stay with it,
In order to win the prize.

Life's battles don't always go,
To the one with the better plan.
For more often than not, you will win,
If only you think you can.